Why is it so hard for you people to look at what is actually happening? Nothing is sold. Factually, the system just plays with the numbers according to some protocols. Can you comprehend the reality of that? Nothing is sold or bought in your example. People sell and buy liabilities in the banking system. Liability is the type of money. Operation with the numbers in the banking system means quantifying liabilities. Liabilities are existent things in the banking system and are quantified with the numbers. In the Satoshi's system there are neither liabilities nor some other type of money. Only fake quantities. These quantities fool many people by creating the illusion that something exists. That something is quantified with them, like coins. But it's not. Quantities are fake.
Oh, you are still here? You still didn't give up? Damn you are one stubborn person...
First, stop comparing Bitcoin to fiat money. Fiat money represent (or at least should represent) liability as you say. Bitcoin does not represent anything. If you need something to compare Bitcoin to then use gold as it is more similar to gold than to fiat money. The only difference is that gold is a physical thing and Bitcoin is not. But you can't say that Bitcoin doesn't exist because it exist. It is a digital data that is generated to reward system that solves complex mathematical calculations in order to verify transactions.
I am not comparing Satoshi's numbers to fiat money. This is what you do. First you people say that Satoshi's numbers quantity coins. That by holding a number next to an address in the Satoshi's system you own coins. Then it is explained to you that coins are tangible items, and that nothing tangible exist in the possession of address holders. What you do then? Well, then you start to compare Satoshi's numbers to fiat money because numbers on deposit accounts are intangible. Then it is explained to you that numbers on deposit accounts exist just to quantity or represent liabilities. That liability is intangible type of money which exists in the banking system. And that no liabilities exist in the Satoshi's system. What you do then? Then you go back to comparing Satoshi's numbers to gold. To tangible item. So, it is impossible to have a rational discussion with you people. Given you cannot show bitcoin, all you do is creating false analogies or twisting the meaning of words that are used in finance or economics. That literally all you do. You engage in all that irrational behavior while in reality everything is so simple. All you have to do is state the obvious: bitcoin doesn't exist. Satoshi's paper is nonsense. You see how simple it is? Stop viewing an anonymous guy like he's som kind of God. He's not. He's just a person ignorant of economics, which is why he wrote paper with many incorrect statements and assumptions. Stop accepting them at face value.